would not install updates
ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: python3-cryptography 1.2.3-1ubuntu0.3
ProcVersionSignature: Ubuntu 4.10.0-28.32~16.04.2-generic 4.10.17
Uname: Linux 4.10.0-28-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.30
Architecture: amd64
Date: Sun Jul 11 15:16:59 2021
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2021-07-11 (0 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
RelatedPackageVersions:
dpkg 1.18.4ubuntu1.7
apt 1.2.35
SourcePackage: python-cryptography
Title: package python3-cryptography 1.2.3-1ubuntu0.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)
package:python3-cryptography:1.2.3-1ubuntu0.3
Setting up python3-cryptography (1.2.3-1ubuntu0.3) ...
Traceback (most recent call last):
File "/usr/bin/py3compile", line 36, in <module>
from debpython import files as dpf, PUBLIC_DIR_RE, memoize
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 661, in exec_module
File "<frozen importlib._bootstrap_external>", line 765, in get_code
File "<frozen importlib._bootstrap_external>", line 476, in _compile_bytecode
ValueError: bad marshal data (unknown type code)
dpkg: error processing package python3-cryptography (--configure):
subprocess installed post-installation script returned error exit status 1
This type of error typically occurs because the cached .pyc files are out of date for some reason. (C.f. https:/
This specific issue is occurring not in python-cryptography itself, but rather in the /usr/bin/py3compile call when its trying to import debpython. In other words, something's inconsistent with your system's cached python code. It sounds like perhaps force reinstalling python3-minimal might be worth trying.